On 03/07/2014 03:30 AM, Andrew Woodward wrote: > After speaking with the TrippleO folks about how they want to > transition from supporting single controller plane, to only supporting > HA controller plane, but allowing a controller plane to scale down to > 1. I thought, why don't we do that? > > Why should we: > 1) Starting with a control plane that is HA ready has been requested > multiple times > 2) It gets rid of all kinds of separate code-paths to support two > deployment types
+1 to that. IMHO, it is a good idea indeed. I remember my first installations of Fuel v0.99.x were made as HA case with cluster size = 1. > 3) It ensures that more code and components of HA are tested > 4) It reduces the amount of unit tests that are needed to support > testing both deployment types > 5) It helps to ensure that scale up, scale swap (replace failed nodes) > and later down are handled better. > > And best of all, it already works! I've tested with only the patch > below. We can deploy 1 controller and then add 2, and 3 with out any > observed problems (OSTF passes in both cases) > > To enable for the fuel CLI > > diff --git a/nailgun/nailgun/task/task.py b/nailgun/nailgun/task/task.py > index b4a3985..bfd2e8d 100644 > --- a/nailgun/nailgun/task/task.py > +++ b/nailgun/nailgun/task/task.py > @@ -438,9 +438,9 @@ class CheckBeforeDeploymentTask(object): > raise errors.NotEnoughControllers( > "Not enough controllers, %s mode requires at least 1 " > "controller" % (cluster_mode)) > - elif cluster_mode == 'ha_compact' and controllers_count < 3: > + elif cluster_mode == 'ha_compact' and controllers_count < 1: > raise errors.NotEnoughControllers( > - "Not enough controllers, %s mode requires at least 3 " > + "Not enough controllers, %s mode requires at least 1 " > "controllers" % (cluster_mode)) > -- Best regards, Bogdan Dobrelya, Skype #bogdando_at_yahoo.com Irc #bogdando -- Mailing list: https://launchpad.net/~fuel-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~fuel-dev More help : https://help.launchpad.net/ListHelp
